Patients in the experimental group will follow the obstetrician's and multidisciplinary path which provides osteopathic treatments, mindfulness, yoga, clinical nutrition, coaching and usual obstetric care.

Patients in control group will continue the routine obstetrical care as established by international guidelines

OMT will be used to treat pregnancy women after having performed a manual osteopathic assessment. The first osteopathic evaluation is carried out during the 12th week, with the possibility to undertake a personalized treatment built on the needs of the single patient; the chosen techniques are based on the collected data by the operator. A "black-box" type of treatment is undertaken.

Change from Visual Analogue Scale (VAS) of pain at 6 months. VAS values range from 0-10, where 10 means highest pain and 0 no pain

Change from Oswestry disability index 2.1° - Italian version (ODI) of the score at 6 months. The ODI represents a ten 6-point questionnaire. The first section rates the intensity of pain and the remaining ones cover the disabling effect of pain on typical daily activities: personal care, lifting, walking, sitting, standing, sleeping, sex life, social life, and travelling. Each item ranges from 0 to 5 and the sum of the 10 scores is expressed as a percentage of the maximum scores, varying from 0 (no disability) to 100 (maximum disability)

Change from Pregnancy mobility index (PMI) of the score at 6 months. PMI is a self-report questionnaire to assess mobility in relation to back and pelvic girdle pain. The PMI consists of three scales: daily mobility in the house, household activities and mobility outdoors. Every item has a score option from 0-3 (respectively 'no problems performing this task', 'some effort performing this task', 'much effort performing this task', 'performing this task is impossible or only possible with the aid of others'), which was transformed to a 0-100 scale. Each domain score is the mean of all included items.

Change from Pelvic-girdle pain questionnaire (PGQ) of the score at 6 months. The PGQ is a condition-specific, patient-reported outcome measure designed to measure pregnancy-related back pain and pelvic girdle pain for use both during pregnancy and postpartum in research and clinical practice. The questionnaire includes items relating to 2 scales (activity/ participation and body functions [symptoms]). Self-report questionnaire of 20 activity items and 5 symptom items scored on a 4-point response scale. Each question is scored from 'Not at all' (0) to 'To a large extent' (3). Questions on the activity sub-scale range from difficulty with dressing, climbing stairs, doing housework, rolling in bed to pushing a shopping cart. Item scores are summed and transformed to yield a score of 0 to 100, where 100 is the worst possible score.

Change from Ryff's Psychological Well-Being Scales (PWB) of the score at 6 months. Ryff, the 42-item Psychological Wellbeing (PWB) Scale measures six aspects of wellbeing and happiness: autonomy, environmental mastery, personal growth, positive relations with others, purpose in life, and self-acceptance. Respondents rate how strongly they agree or disagree with 42 statements using a 7-point scale (1 = strongly agree; 7 = strongly disagree).